Antenna



FIG. 1 is a top plan view of an antenna.

FIG. 2 is a side elevation view of the antenna of FIG. 1.

FIG. 3 is a side elevation view of the antenna of FIG. 1.

FIG. 4 is a front elevation view of the antenna of FIG. 1.

FIG. 5 is a rear elevation view of the antenna of FIG. 1.

FIG. 5 is a top perspective view of the antenna with a base in broken lines; and,

FIG. 6 is a top perspective view of the antenna.

The broken line in the figure drawings represents unclaimed environment only and forms no part of the claimed design. 

CLAIM The ornamental design for an antenna, as shown and described. 